I use this for testing, and I think this might be useful in the
future.

Signed-off-by: Anton Vorontsov <avoront...@mvista.com>
---
 common/hwconfig.c |   55 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 55 insertions(+), 0 deletions(-)

diff --git a/common/hwconfig.c b/common/hwconfig.c
index 85a69da..1f9f4a0 100644
--- a/common/hwconfig.c
+++ b/common/hwconfig.c
@@ -11,12 +11,20 @@
  * the License, or (at your option) any later version.
  */
 
+#ifndef HWCONFIG_TEST
 #include <config.h>
 #include <common.h>
 #include <exports.h>
 #include <hwconfig.h>
 #include <linux/types.h>
 #include <linux/string.h>
+#else
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#define min(a, b) (((a) < (b)) ? (a) : (b))
+#endif /* HWCONFIG_TEST */
 
 static const char *hwconfig_parse(const char *opts, size_t maxlen,
                                  const char *opt, char *stopchs, char eqch,
@@ -209,3 +217,50 @@ int hwconfig_subarg_cmp(const char *opt, const char 
*subopt, const char *subarg)
 
        return !strncmp(argstr, subarg, arglen);
 }
+
+#ifdef HWCONFIG_TEST
+int main()
+{
+       const char *ret;
+       size_t len;
+
+       setenv("hwconfig", "key1:subkey1=value1,subkey2=value2;key2:value3;;;;"
+                          "key3;:,:=;key4", 1);
+
+       ret = hwconfig_arg("key1", &len);
+       printf("%zd %.*s\n", len, (int)len, ret);
+       assert(len == 29);
+       assert(hwconfig_arg_cmp("key1", "subkey1=value1,subkey2=value2"));
+       assert(!strncmp(ret, "subkey1=value1,subkey2=value2", len));
+
+       ret = hwconfig_subarg("key1", "subkey1", &len);
+       printf("%zd %.*s\n", len, (int)len, ret);
+       assert(len == 6);
+       assert(hwconfig_subarg_cmp("key1", "subkey1", "value1"));
+       assert(!strncmp(ret, "value1", len));
+
+       ret = hwconfig_subarg("key1", "subkey2", &len);
+       printf("%zd %.*s\n", len, (int)len, ret);
+       assert(len == 6);
+       assert(hwconfig_subarg_cmp("key1", "subkey2", "value2"));
+       assert(!strncmp(ret, "value2", len));
+
+       ret = hwconfig_arg("key2", &len);
+       printf("%zd %.*s\n", len, (int)len, ret);
+       assert(len == 6);
+       assert(hwconfig_arg_cmp("key2", "value3"));
+       assert(!strncmp(ret, "value3", len));
+
+       assert(hwconfig("key3"));
+       assert(hwconfig_arg("key4", &len) == NULL);
+       assert(hwconfig_arg("bogus", &len) == NULL);
+
+       unsetenv("hwconfig");
+
+       assert(hwconfig(NULL) == 0);
+       assert(hwconfig("") == 0);
+       assert(hwconfig("key3") == 0);
+
+       return 0;
+}
+#endif /* HWCONFIG_TEST */
-- 
1.7.0.5
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